Preparation of protein-stabilized β-carotene nanodispersions by emulsification-evaporation method

Boon Seang Chu, Sosaku Ichikawa, Sumiyo Kanafusa, Mitsutoshi Nakajima

研究成果: ジャーナルへの寄稿記事

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This work was initiated to prepare protein-stabilized β-carotene nanodispersions using emulsification-evaporation. A pre-mix of the aqueous phase composed of a protein and hexane containing β-carotene was subjected to high-pressure homogenization using a microfluidizer. Hexane in the resulting emulsion was evaporated under reduced pressures, causing crystallization and precipitation of β-carotene inside the droplets and formation of β-carotene nanoparticles. Sodium caseinate (SC) was the most effective emulsifier among selected proteins in preparing the nanodispersion, with a monomodal β-carotene particle-size distribution and a 17-nm mean particle size. The results were confirmed by transmission-electron microscopy analysis. SC-stabilized nanodispersion also had considerably high ζ-potential (-27 mV at pH 7), suggesting that the nanodispersion was stable against particle aggregation. Increasing the SC concentration decreased the mean particle size and improved the polydispersity of the nanodispersions. Nanodispersions prepared with higher β-carotene concentrations and higher organic-phase ratios resulted in larger β-carotene particles. Although increased microfluidization pressure did not decrease particle size, it did improve the polydispersity of the nanodispersions. Repeating the microfluidization process at 140 MPa caused the nanodispersions to become polydisperse, indicating the loss of emulsifying capacity of SC due to protein denaturation.

元の言語英語
ページ(範囲)1053-1062
ページ数10
ジャーナルJAOCS, Journal of the American Oil Chemists' Society
84
発行部数11
DOI
出版物ステータス出版済み - 11 1 2007
外部発表Yes

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Organic Chemistry

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